F-2
Appendix F
If a detector with Envirolink (IEC) reports an
alarm condition before the detector’s alarm
threshold is adjusted, the alarm delays until
the alarm threshold is adjusted. If the device
continues to report an alarm condition once
its alarm threshold is adjusted, the alarm
reports.
If the CSG-M and the device ID do not agree,
the IEC for that device does not activate
until the trouble condition is removed from
the system and the panel is reset.
MXL-IQ Power On
When a system is brought on-line, or when
there is a complete loss of power in an
MXL-IQ enclosure containing detectors with
IEC applied, the operator must perform a
reset sequence for the IEC devices in that
MXL-IQ and also reset the MXL-IQ.
When an MXL-IQ is powered the first time,
and there is no data for IEC devices, MXL-IQ
leaves these devices at the default alarm
threshold. However, if former IEC data is
available, MXL-IQ adjusts the device alarm
threshold accordingly.
Ongoing Adjustments of the
Alarm Threshold
Environmental conditions usually cause a
small change in the analog voltage over a
long period of time. At regular intervals
MXL-IQ collects analog data for each
detector with IEC and adjusts the alarm
threshold accordingly. MXL-IQ adjusts for
both up and down changes in the analog
voltage. In addition, if system power is lost,
MXL-IQ adjusts the alarm thresholds as
needed by using stored data.
Indicating IEC Trouble Conditions
A trouble condition involving the IEC may
be annunciated by the MXL-IQ as:
PRE-DIRTY ANALOG VOLT. REACHED
OR
IEC LIMIT REACHED. SERVICE REQ
The trouble conditions shown above are
annunciated on a detector-by-detector
basis as each detector is checked.
MXL-IQ annunciates a trouble condition for
a detector when its alarm threshold
reaches a predetermined limit. The opera-
tor should acknowledge the trouble, clean
the detector if possible, and reset the
control panel. If the detector is not cleaned,
the control panel annunciates this trouble
condition after every panel reset until the
detector is cleaned. When it is cleaned, that
is detected by the Auto Clean Detection
feature.
Automatic Cleanliness Detection
MXL-IQ automatically detects when an IEC
detector was cleaned and checks whether
the detector is considered clean by MXL-IQ’s
standards. If the detector is clean, IEC data
for that device is reset to clean levels, and
the following message prints:
Detector Cleaned
NOTE: Automatic detection and documen-
tation of the cleaning of a detector by
MXL-IQ may take as long as 1 hour. To
avoid this, use the Det cleaned option in
the Test menu to avoid automatic clean
detection. When you enter the address of
the detector that was cleaned, MXL-IQ
adjusts that detector’s Norm sensitivity
setting reference.
Detector Cleaned
IEC must be enabled in the CSG-M in order
to have access to the Det_cleaned option
through the MXL-IQ Annunciator Panel.
At the Test menu, use the Left or Right
arrow key to cause the D in Det_cleaned to
start blinking:
TEST: OVERRIDE DET CLEANED
Press ENTER when the D is blinking to
select Det_cleaned.
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